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MC908AP32CFAE 参数 Datasheet PDF下载

MC908AP32CFAE图片预览
型号: MC908AP32CFAE
PDF下载: 下载PDF文件 查看货源
内容描述: [MC908AP32CFAE]
分类和应用:
文件页数/大小: 325 页 / 4102 K
品牌: FREESCALE [ Freescale ]
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5V Oscillator Characteristics  
22.7 5V Oscillator Characteristics  
Table 22-6. Oscillator Specifications (5V)  
Characteristic(1)  
Symbol  
Min  
Typ  
Max  
Unit  
88k(2)  
fICLK  
Internal oscillator clock frequency  
64k  
104k  
Hz  
External reference clock to OSC1(3)  
fOSC  
dc  
32M  
Hz  
fXTALCLK  
CL  
Crystal reference frequency  
Crystal load capacitance(4)  
Crystal fixed capacitance(5)  
30  
32.768  
12.5  
15  
100  
kHz  
pF  
C1  
pF  
Crystal tuning capacitance(6)  
Feedback bias resistor  
Series resistor  
C2  
15  
pF  
RB  
1
10  
22  
MΩ  
kΩ  
RS  
100  
330  
470  
fRCCLK  
REXT  
External RC clock frequency  
RC oscillator external R  
RC oscillator external C  
7.6M  
Hz  
See Figure 22-1  
10  
CEXT  
pF  
1. The oscillator circuit operates at VREG  
.
2. Typical value reflect average measurements at midpoint of voltage range, 25 °C only.  
3. No more than 10% duty cycle deviation from 50%. The max. frequency is limited by an EMC filter.  
4. Crystal manufacturer value.  
5. Capacitor on OSC1 pin. Does not include parasitic capacitance due to package, pin, and board.  
6. Capacitor on OSC2 pin. Does not include parasitic capacitance due to package, pin, and board.  
MCU  
C
V
= 10 pF  
EXT  
8
6
4
2
0
= 5V, @ 25°C  
DD  
OSC1  
V
REG  
R
C
EXT  
EXT  
0
10  
20  
30  
(k)  
40  
50  
Resistor, R  
EXT  
Figure 22-1. RC vs. Frequency  
MC68HC908AP Family Data Sheet, Rev. 4  
Freescale Semiconductor  
301